Poisoning

Poisoning is a game mechanic, and a way to eliminate students or rivals without leaving any incriminating evidence.

Gameplay[]

The protagonist can poison most students with few exceptions. During lunchtime from 1:00 PM to 1:23 PM, they will scatter all over the school to eat, including on the rooftop and outside, where the students that belong to a club eat close to their club room. The protagonist can lure away students from their lunches by giggling, turning on radio, using bang snaps, or stink bombs. In the 1980s Mode, Ryoba can poison a rival's bento before lunchtime by taking it from her bookbag in Classroom 2-1. Ayano can also poison Osana Najimi's bento on Monday, after leaving them in the classroom.

There are 4 different types of poisons available to the player for use: Lethal, Emetic, Sedative, and Headache. Each can be obtained by creating them in the Science Lab, Gardening Club, or purchasing them from Info-chan.

Lethal poison[]

2-8-2016 - KokonaStruggling — Kokona Haruka choking to death. March 31st, 2016.

It's located on the second floor in the eastern wing, in the Science Lab. It'll only be available after having at least Rank 1 at the Chemistry stat (the exact location of the poison can be pinpointed by using Yandere Vision). It can also be obtained from Info-chan by using the Drops Menu, costing 50 Info Points (10 in Mission Mode), from The Yakuza for $100 in the 1980s mode, created by mixing barium carbonate and acetic acid in the Science Lab (You need to have at least Rank 4 at the Chemistry stat), or be grown in the gardening greenhouse if you are a member of the Gardening Club. This will take four days.

If the player places a student's lunch with a lethal poison, they will die immediately. Students will react to lethally poisoned victims as any other corpse. The police will be unable to revive the student but treat the death as a murder case, if there weren't any other murders, because of the lack of evidence the police should be unable to solve the mystery of the case. The School Atmosphere will then decrease by ten points.

Emetic poison[]

Screen Shot 2017-01-04 at 6.16 — Osana Najimi vomiting after ingesting emetic poison.

It's located in the Gardening Club's shed as a Rat Poison, the player needs to be a member of the Gardening Club, pickpocket the Gardening Club leader, or have a lockpick to gain access to this place. This item can be found at Buraza Town's convenience store and brought to school for $8.94. It can also be obtained via the drops menu, costing 25 Info Points (10 in Mission Mode), created by mixing salt and mustard (both found in the Cooking Club) in the Science Lab (You need to have at least Rank 1 at the Chemistry stat), or be grown in the gardening greenhouse if you are a member of the Gardening Club. This will take four days.

If the player adds emetic poison/rat poison to a student's bento, the student will quickly get up and head to the closest bathroom to vomit, with his/her hands clutched against their stomach. The protagonist can drown them in a toilet or electrocute them in the bathrooms. It can also be used to sabotage rival events by adding it to Senpai's bento on a Monday.

Sedative[]

The player can obtain Sleeping Medicine in the Convenience store in town, in the Insane Asylum, or purchase them from Info-chan for 50 Info points. Sedatives can be crafted in the Science Lab (You need to have at least Rank 3 at the Chemistry stat) by mixing chloroform and acetone, this items can be found in the Science Lab, or be grown in the gardening greenhouse if you are a member of the Gardening Club. This will take four days.

Students poisoned with sedatives will go to the infirmary and sleep there until class time. It can also be used as a tranquilizer to kidnap students. It could sabotage rival events by adding it to the rival's bento on a Thursday in 1980s mode.

Headache[]

The player can make a headache poison after learning rank 2 of Chemistry by combining Tyramine and Phenylethylamine in the Science Lab. Both ingredients are also found there. Poisoning a student with a headache poison will cause the student to go to the infirmary, ask Nasu Kankoshi for some pills, and sit on the infirmary's couch until lunchtime ends.

While Nasu takes the pills for the student in the infirmary cabinet, the player has the opportunity to steal a tranquilizer from that cabinet, which can be used for kidnapping. Alternatively, in 1980s mode Ryoba can also lockpick the cabinet.

It can also be grown in the gardening greenhouse if you are a member of the gardening club. This will take four days.

Trivia[]

Poisoning was implemented in the June 1st, 2015 Build. The January 17th, 2019 build made the player able to poison most students.
- The Poisoning event for Kokona was originally on Tuesday instead of Wednesday; however, YandereDev moved it to Wednesday so that the player can have enough time to invest at least 20 study points into Chemistry.^[1]
Senpai cannot be poisoned, with his bento disappearing when he goes to investigate strange laughter from the protagonist. Gema Taku, Miyuji Shan (unless in Mission Mode), the bullies (unless the pool is closed), the Photography Club members (when the school atmosphere is low), and The Student Council members (unless fired in Mission Mode) cannot be poisoned because they don't eat lunch.
- Monday is usually the only day where the player has a chance to have Raibaru Fumetsu poisoned.
In early builds of the game, the "end of the day" cutscene said that paramedics are going to revive poisoned students but are unable to revive them.
In future versions of the game, students may run to the nurse (Nasu Kankoshi/Muja Kina) instead.^[2]
In the future, the player may be able to poison a rival's water. The method would be challenging and would require a lot of stalking^[3], though potentially rewarding if done correctly.
The poison used is barium acetate, which works incredibly fast and is almost untraceable.^[4] A $150,000 poison detection machine is required to detect it in autopsies and Buraza Town does not have this item.^[4]
If a majority of rivals are poisoned (or otherwise died and he knows about it), Senpai will worry that he is cursed and will not accept your love confession, in fear of the protagonist dying as well.^[5]
Poisoning is the canonical elimination method of Sumiko Tachibana.